slow speed suppose due to Gig1 - 0 Downstream DOCSIS 3.1 Channels

[malhotra_km]

Hello,

I have upgraded three months ago and still not able to get more than 500 speed in best circumstances. Spoken to virgin media multiple times but nothing sorted.

Looking for help.

[jbrennand]

Whilst waiting for the images....

Your ~500Mbps.... is that over wifi or on an ethernet cable connected computer or laptop?

If wifi then you will never get much more than that as the Hub4 is only wifi5. You will need Wifi6 equipment to get more speed over wifi.

https://www.increasebroadbandspeed.co.uk/realistic-speeds-wi-fi-5-and-wi-fi-6

[malhotra_km]

Thanks @jbrennand, its on wired connection.

Here is the DOCSIS channels I get. not sure the issue is due to only getting DOCSIS 3.0 channels?

Channel Overview Downstream Upstream

DOCSIS 3.0 channels	31	4
DOCSIS 3.1 channels	1	0

[jbrennand]

I cant read you images - can you post the data as text as below - someone more familiar with the Hub4 can then comment. There may be other reasons why you only get ~500. Are you in modem mode?...  with your router applying some QoS to ration the bandwidth. Other equipment concurrently connected - can, and does affect speeds ... So disconnect all other ethernet connected and wifi devices.  Also test at https://speedtest.samknows.com/ - if speeds are still low - boot the computer/laptop into safe+networking mode and test speeds again
____________________

Just copy/paste the normal “Formatted Text” (not images) 3 FULL sets of data onto here – 2 pages from the Downstream, 2 from the Upstream, & also the Network Logs page. Don't worry too much about the formatting it can be easily read & DON’T include personal data or MAC addresses - blank them out - if you copy/paste the data, the board software will do this for you (you may need to click the "submit" button again. If character limits are “exceeded” - just do two posts if you exceed the character limits.

[malhotra_km]

3.0 Downstream channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

25	331000000	-0.900002	40.946209	QAM256	25
10	211000000	-1.000000	40.366287	QAM256	10
11	219000000	-1.299999	40.946209	QAM256	11
12	227000000	-1.400002	38.983261	QAM256	12
13	235000000	-1.700001	38.983261	QAM256	13
14	243000000	-1.599998	40.366287	QAM256	14
15	251000000	-1.900002	38.983261	QAM256	15
16	259000000	-1.400002	40.366287	QAM256	16
17	267000000	-1.599998	38.983261	QAM256	17
18	275000000	-1.500000	38.983261	QAM256	18
19	283000000	-1.000000	40.366287	QAM256	19
20	291000000	-0.299999	40.366287	QAM256	20
21	299000000	0.400002	40.366287	QAM256	21
22	307000000	0.000000	40.366287	QAM256	22
23	315000000	-0.400002	40.946209	QAM256	23
24	323000000	-1.000000	40.366287	QAM256	24
26	339000000	-0.599998	40.366287	QAM256	26
27	347000000	-0.299999	40.366287	QAM256	27
28	355000000	-0.500000	40.366287	QAM256	28
29	363000000	-0.299999	40.366287	QAM256	29
30	371000000	-0.400002	40.366287	QAM256	30
31	379000000	-0.700001	40.366287	QAM256	31
32	387000000	-0.700001	40.366287	QAM256	32
33	395000000	-0.799999	40.366287	QAM256	33
34	403000000	-0.900002	40.366287	QAM256	34
35	411000000	-1.000000	40.366287	QAM256	35
36	419000000	-1.000000	40.366287	QAM256	36
37	427000000	-1.000000	40.366287	QAM256	37
38	435000000	-0.900002	40.366287	QAM256	38
39	443000000	-0.900002	40.366287	QAM256	39
40	451000000	-1.099998	40.946209	QAM256	40

3.0 Downstream channels

Channel Lock Status RxMER (dB) Pre RS Errors Post RS Errors

25	Locked	40.946209	3	0
10	Locked	40.366287	3	0
11	Locked	40.946209	2	0
12	Locked	38.983261	2	0
13	Locked	38.983261	3	0
14	Locked	40.366287	2	0
15	Locked	38.983261	7	0
16	Locked	40.366287	0	0
17	Locked	38.983261	5	0
18	Locked	38.983261	5	0
19	Locked	40.366287	0	0
20	Locked	40.366287	1	0
21	Locked	40.366287	13	0
22	Locked	40.366287	2	0
23	Locked	40.946209	5	0
24	Locked	40.366287	3	0
26	Locked	40.366287	2	0
27	Locked	40.366287	6	0
28	Locked	40.366287	5	0
29	Locked	40.366287	4	0
30	Locked	40.366287	0	0
31	Locked	40.366287	1	0
32	Locked	40.366287	6	0
33	Locked	40.366287	4	0
34	Locked	40.366287	2	0
35	Locked	40.366287	1	0
36	Locked	40.366287	2	0
37	Locked	40.366287	5	0
38	Locked	40.366287	4	0
39	Locked	40.366287	2	0
40	Locked	40.946209	2	0

3.1 Downstream channels

Channel Channel Width (MHz) FFT Type Number of Active Subcarriers Modulation (Active Profile) First Active Subcarrier (Hz)

41

96

4K

1880

QAM4096

728

3.1 Downstream channels

Channel ID Lock Status RxMER Data (dB) PLC Power (dBmV) Correcteds (Active Profile) Uncorrectables (Active Profile)

41

Locked

42

-0.8

3520843755

0

[malhotra_km]

3.0 Upstream channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID

1	39400000	49.520599	5120 KSym/sec	64QAM	7
2	46200000	49.770599	5120 KSym/sec	64QAM	3
3	60300000	50.520599	5120 KSym/sec	64QAM	1
4	53700000	50.020599	5120 KSym/sec	64QAM	2

3.0 Upstream channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

1	US_TYPE_STDMA	0	0	2	0
2	US_TYPE_STDMA	0	0	1	0
3	US_TYPE_STDMA	0	0	1	0
4	US_TYPE_STDMA	0	0	1	0

[malhotra_km]

Network Log

Time	Priority	Description
Sat Oct 9 09:04:41 2021	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 9 13:27:31 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Tue Oct 12 03:04:19 2021	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 15 15:03:41 2021	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 15 20:21:07 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 15 21:48:34 2021	6	CM-STATUS message sent. Event Type Code: 24; Chan ID: 41; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Sat Oct 16 06:10:45 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Mon Oct 18 23:30:09 2021	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Sun Oct 24 16:26:46 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Mon Oct 25 22:13:30 2021	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Fri Oct 29 09:04:48 2021	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Sun Oct 31 02:39:06 2021	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Sun Oct 31 14:29:05 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Tue Nov 2 18:26:23 2021	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Wed Nov 3 07:35:58 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Sat Nov 6 06:26:23 2021	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Tue Nov 9 00:38:27 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Tue Nov 9 15:57:14 2021	6	CM-STATUS message sent. Event Type Code: 24; Chan ID: 41; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Tue Nov 9 18:26:24 2021	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Tue Nov 9 21:59:22 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Sat Nov 13 06:26:24 2021	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 15 00:39:41 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Tue Nov 16 18:26:24 2021	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Wed Nov 17 08:01:04 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Sat Nov 20 06:26:24 2021	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Sat Nov 20 16:31:51 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 17:29:06 2021	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Thu Jan 1 00:01:23 1970	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Mon Nov 22 18:09:06 2021	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Wed Nov 24 23:48:45 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Thu Nov 25 00:17:48 2021	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Tue Nov 30 09:50:36 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Wed Dec 1 09:52:17 2021	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Sun Dec 5 03:38:08 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Mon Dec 6 04:17:30 2021	6	CM-STATUS message sent. Event Type Code: 5; Chan ID: 22; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Wed Dec 8 09:52:17 2021	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Wed Dec 15 08:37:12 2021	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Wed Dec 15 08:37:23 2021	5	RCS Partial Service;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Wed Dec 15 08:37:41 2021	6	CM-STATUS message sent. Event Type Code: 4; Chan ID: 41; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Thu Dec 16 10:30:31 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Fri Dec 17 00:20:13 2021	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Fri Dec 17 06:18:59 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Sun Dec 19 17:51:17 2021	4	DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Sun Dec 19 22:52:25 2021	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;

[jem101]

@malhotra_km the channel allocation is right, for the gig one tier, there should be 31 DOCSIS 3.0 channels and one 3.1 channel, and that’s on the downstream, the upstream is four 3.0 channels. Upstream power is worryingly close the upper limit but if it is stable then that’s not necessarily an issue. There is nothing in the logs to indicate any issue, although they seem to end around 19th December so possibly something else is going on which the logs aren’t reporting.

Personally I’d do a complete factory (pinhole) reset of the hub and then run a Speedtest and also see what the logs show.

[malhotra_km]

reset it,

here is latest logs

Refresh data

Network Log

Time Priority Description

Thu Jan 1 00:01:26 1970	3	No Ranging Response received - T3 time-out;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;
Tue Jan 4 17:20:59 2022	5	MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=***;CMTS-MAC=***;CM-QOS=1.1;CM-VER=3.1;

[malhotra_km]

just to add, no improvement on speed.